reproduction and development

Budding

A form of asexual reproduction of yeast in which a new cell grows out of the body of a parent.

Fission

individuals split in two

parthenogenesis

Asexual reproduction in which females produce offspring from unfertilized eggs.

asexual reproduction forms

budding, fission and parthenogenesis

Haploid

An organism or cell having only one complete set of chromosomes.

Fertilization

Process in sexual reproduction in which male and female reproductive cells join to form a new cell

Diploid

(genetics) an organism or cell having two sets of chromosomes or twice the haploid number

Zygote

fertilized egg

Spermatogenesis

the production of sperm cells

spermatogonium

sperm stem cell before it undergoes meiosis

primary spermatocyte

a cell that divides to form two secondary spermatocytes

secondary spermatocytes

Haploid cells resulting from the first meiotic division of spermatogenesis. Secondary spermatocytes are ready to enter meiosis II.

Leydig cells

A cell that produces testosterone and other androgens and is located between the seminiferous tubules of the testes.

Sertoli cells

cells found within the seminiferous tubules that provide metabolic support for the spermatids

Epidymis

a highly convoluted duct behind the testis, along which sperm passes to the vas deferens.